Hub-turning machine



(No Model.) 3 Sheets-Sheet 1.-

. y E. 0'. CLARK. v V Turning Machine. No. 229,096. Patented June 22,1880.

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(No Model.) 3Sheets-Sheet 2.

' E. 0. CLARK.

Hub Turning Machine. No. 229,096. Patented June 22, I880.

(No Model.) a Sheath-Sheet s.

c. CLARK. Hub Turning Machine.-

No. 229,096. Patented June 22,1880.

\NVENTOR WITNESSES N. FETERSv PHO'TO-LITHOGRAFHER, WASHINGTON. Dv C.

UNITED STATES PATENT OEEicE.

ELLERY O. CLARK, OF DE PERE, ASSIGNO-R OF ON E-HALF OF HIS RIGHT TO A. J. WEBSTER, MENASHA, VVISQONSIN.

HUB-TURNING MACHINE.

SPECIFICATION forming part of Letters Patent No. 229,096, dated June 22, 1880.

Application filed April 7, 1880. (N model.) i i To all whom "it may concern Be it known that I, ELLERY G. CLARK, of De Pere, in the county of Brown, and in the State of Wisconsin, have invented certain new and useful Improvements in Hub Turning Machines; and I do hereby declare that the following is a full, clear, and exact description thereof.

My invention relates to lathes for turning to hubs and like articles and it consists in the device hereinafter fully described and claimed.

Figure 1 is a front elevation of a hub-lathe embodying my invention. Fig. 2 is a plan view. Fig. 3 is an end view. Fig. 4 is a vertical transverse section. Fig. 5 is a top view of a portion of the lathe, showing the stops for limiting the play of the knife-frame.

Like letters refer to like parts wherever the occur.

In the drawings, A indicates the lathe-bed, upon which, in suitable standards, A, are mounted the mandrel E and tail stock .R, which support and rotate the hub-blank E. The mandrel E is caused to revolve by a belt, 0, which passes from a pulley, D, on the mandrel-stock to a pulley, B, on the main shaft B, which latter receives its power through pulley O.

In order to tighten the belt 0 when the 0 blank is to be revolved, tighteningpulley F is employed, said pulley mounted in a swinging frame, F, to the lower end of which a Weight or. counter-balance, F, is attached by means of an arm, a, which latter is operated from a 5 rock-shaft, G, by a treadle, G, and a series of intermediate levers, a b b.

As such devices form no part of the present invention, and as any of the well-known equivalents therefor may be employed in- 40 stead, they need not be more specifically described herein.

I will' now proceed to describe myimproved devices, which pertain especially to the knifeframe and its operation.

Between hangers b I), which afford central bearings for the pulley-shaft B, I place on said shaft a. loose sleeve, h, from which extend the uprights h h of the swinging or oscillating frame H. This frame H", which carries the 5o roughing and finishing knives, consists of end pieces I, joined by cross-bars and provided with elliptical openings, from the upper part of which project cogs d, that engage with pinions d on shaft J, by which the oscillating frame is operated. 5 5

On one side of the frame H, I attach the roughing-knife K, which maybe either continuous or in sections, and may be provided with spurs i, as shown in Fig. 3, for dividing thechips made by said knife. An adjustable 6o stop, L, determines the depth of cut made by knife K. On a slide, 0, on the opposite side of frame H, I attach the ordinary finishingknives m a.

To impart motion to the shaft J which carries the pinion d, that operates frame H, a hand-wheel, J, is provided.

w, Figs. 1 and '3, indicates a pawl-lever, which is usually held bya springw, but which, when released from the spring, will engage with a wheel, w, on the shaft J, and thus lock the shaft, so that by said devices the frame H may be secured in any desired position.

Secured on the side of the oscillating frame H next the roughing-knife K is a stop, 6, (see Fig. 5,) which, as the frame oscillates in one direction, comes in contact with a post or projection, e, on the lathe-bed or on the upright A, and limits the motion of the frame in that direction, while a second stop, e, secured to the top of the frame H, is provided to engage with the stop 6 and limit the motion of the frame in the opposite direction.

These stops are preferably formed with slots and secured by set-screws, as shown, or other- 8 5 wise renderedadjustable, so that they may be changed to alter the distance through which the frame H is permitted to move.

' S indicates the end-finishing knife, which is mounted on a slide, P, operated by a lever, T, pivoted to the standard of the tail-stock R by a link, '11.

The operation of these devices will be as follows: The hub-blank, having been clamped in the lathe, will be, when in position, between 5 the roughing-knife K and the finishing-knives m n. The treadle G may then be depressed to rotate rock-shaft G and elevate the counter-balance F, which will bring the tightening-pulley F against the belt (land cause the 1 0 rotation of mandrel E and the hub-blank E. If the hand-wheel J is now turned to'the left, the pinion d will engage with rack d on frame H and oscillate the frame so that the knife K will be carried up to the blank as the latter is rapidly revolved, and as the blank is reduced the knife may be further advanced by Having thus described my invention, what I claim, and desire to secure by Letters Patent, is

In a hub-turning machine, the combination, with the roughing and finishingknives, of a frame by which they are carried, having elliptical openings in its ends, from which depend cogs for receiving the pinions by which the said frame is oscillated and stops for limiting its oscillation, substantially as set forth.

In testimony that I claim the foregoing I have hereunto set my hand this 2d day of April, 1880.

ELLERY C. CLARK.

Witnesses E. F. PARKER, AL ANDERSON. 

